Ball-bearing.



O. HOFFMANN.

BALL BEARING.

APPLICATION FILED DEC. 23. 1912.

1,071,317, 7 Patented Aug. 26, 1913.

M "Fifi L"- mf i I fin/724.

STATES PATENT FFICE.

OSCAR HOFFMANN, OF WILLICH, GERMANY, ASSIGNOR TO STAHLWERK BEGKER AKTIENGESELLSCHAFT, OF WILLIGI-I, GERMANY.

BALL-BEARING.

To all whom it may concern:

Be it known that I, OSCAR HorrMANN, a subject of the King of Prussia, and resident of 7 Moltkestrasse, vVillich, in the Province of the Rhine, German Empire, have in vented certain new and useful Improvements in BalLBearings, of which the following is a specification.

This invention relates to ball bearings of the type in which the two race-rings are each provided with two projecting ribs on their inner opposing face adapted to constitute the ball race, and the object of the present invention is to provide an improved method of inserting the balls in position in bearings of this type without the provision of notches or the like in the ribs and without damaging the ribs.

According to the present invention an annular wedge or ring of triangular cross section is inserted in one of the ball rings so as to rest upon the upper projecting rib thereof and thus constitute a gradient surface over which the balls may be rolled under pressure.

In order that this invention may be more clearly understood, reference is made to the accompanying drawings, which show by way of example, th preferred construction of the improved ball bearing.

Figure 1 is a transverse section through the bearing. Fig. 2 is a half sectional view showing the method of fitting the balls in position. Fig. 3 is a plan of the apparatus with the pressure cap removed.

0n the drawings a and Z) designate the two rings of the bearing which are of substantially rectangular cross section. The inner faces of said rings are provided with laterally projecting ribs a brespectively.

In order to insert the balls 7 in position, the ring a is chucked by means of clamping screws 6 within a rotatable chuck (Z, and a ring 0 of triangular cross section is inserted in the ring a so as to rest upon the upper projecting rib a and thus constitute a gradi- Specification of Letters Patent.

Application filed December 23, 1912.

Patented Aug. 26,1913. Serial No. 738,169.

ent surface over which the balls 7 may be rolled. The halls f are set in position between the inncr ring Z) and the gradient surface 0 as indicated in Fig. 2, and the chuck (Z is then rapidly rotated while at the same time pressure is applied to the inner ring 7) by means of a pressure head f/ whereupon the balls roll upon the surface 0 into position between the rings a and b. i

I claim 1. The method of inserting the balls in a ball bearing having two race-rings each provided with two projecting ribs on their opposing faces, which consists in fitting an annular wedge upon one rib of one of said rings, in inserting the balls between said wedge and the ribs of the other ring, in rotating one of said rings, and in simultaneously forcing the rings into alinement.

2. The method of inserting the balls in a ball bearing having two race-rings each provided with two projecting ribs on their op posing faces which consists in fitting an annular Wedge upon one rib of one of said rings, in inserting the balls between said wedge and the ribs of the other ring, in retating the ring carrying said wedge and in simultaneously forcing the stationary ring into alinement with the rotating ring.

3. The method of inserting the balls in a ball bearing having inner and outer racerings each provided with two projecting ribs on their opposing faces, which consists in fitting an annular wedge upon one rib of said outer ring, in inserting the balls between said wedge and the ribs of said inner ring, in rotating said outer ring and in simultaneously forcing said inner ring into position within said outer ring.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

OSCAR HOFFMA'NN. [1,. s.] Witnesses HELEN NUFER, ALBERT NUFER.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

